CHE 3173 : Test Sample (2012)
Document Summary
Lentic systems provide several distinct habitats that can be important for fisheries production. These habitats often have different structural complexity, water quality, and biota. The annual cycle depends on water temperature (and density) and wind velocity: anoxia-no oxygen, hypoxia- lil oxygen, winter- ice, spring- overturn, summer-stratification, fall- overturn. Lotic systems also provide distinct habitats that can be important for fisheries production. These habitats are typically characterized by differences in depth, flow velocity, and substrate: riffle= large substrates, shallow, glide= deeper than a riffle, but can still see the water flow. Can still see some big substrate, but not much: pool= deepest out of three, and would see mostly sand for the substrate. Although some fishes prefer riffles, most are found in pools, feeding in the invertebrate drift: darter fish- likes to live in riffle, most fish live in the pool, trout- drift feeders.
